Device and method for user equipment side and base station side in wireless communication

ABSTRACT

Provided are a device and method for a user equipment side and a base station side in wireless communication. The device ( 100 ) for a user equipment side comprises: an information acquisition unit ( 101 ), configured to obtain cell special dynamic offset information for wireless resource management of a serving cell and/or adjacent cell of a user equipment, wherein cell special dynamic offset relates to a transmission capacity of a corresponding cell, and the transmission capacity comprises at least one of cell multi-antenna transmission performance gain and a load condition; a measurement unit ( 102 ), configured to measure a reference signal of the serving cell and the adjacent cell; and a cell reselection/measurement reporting unit ( 103 ), configured to perform cell reselection or measurement reporting based on the cell special dynamic offset and a measurement result for the serving cell and the adjacent cell according to a connection state of the user equipment.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a continuation of U.S. application Ser. No.15/556,339, filed Sep. 7, 2017, which is based on PCT filingPCT/CN2016/076959, filed Mar. 22, 2016, which claims priority to CN201510151725.5, filed Apr. 1, 2015, the entire contents of each areincorporated herein by reference.

FIELD OF THE INVENTION

The present disclosure generally relates to the technical field ofwireless communications, in particular to radio resource management inthe wireless communications, and more particularly to a device and amethod for a user equipment side in wireless communications, and adevice and a method for a base station side in wireless communications.

BACKGROUND OF THE INVENTION

In a wireless communication system such as a LTE system, various radioresource management operations such as cell reselection, cell handover,carrier aggregation and dual-connection arc performed based on ameasurement result for a channel. Specifically, a user equipment in aRRC idle state in the current LTE communication system measuresintensities of signals of a serving cell and a neighboring cell, toperform a cell reselection operation. The serving cell of the userequipment does not instruct the neighboring cell in system informationthereof and the user equipment itself performs cell search andmeasurement, so that the neighboring cell is detected. The userequipment starts measuring the neighboring cell based on the Scriterion, and performs cell reselection judgment based on the Rcriterion. Dynamic characteristics of respective cells including theserving cell are not taken into consideration in the current Rcriterion, therefore, a cell reselection result based on the currentcriterion may be not ideal in a scenario where service load balance isperformed for example in an enhanced small cell related to a massiveMIMO.

In addition, in a current RRM measurement mechanism, the above dynamiccharacteristics of the cells are not taken into consideration either inreport triggering determination of the user equipment for themeasurement result. Therefore, for example, a neighboring cell suitableto be used as a candidate cell may fail to be reported on the side ofthe user equipment, and a resource management decision for examplehandover performed by the base station based on the measurement reportresult of the user equipment may be unreasonable.

SUMMARY OF THE INVENTION

In the following, an overview of the present disclosure is given simplyto provide basic understanding to some aspects of the presentdisclosure. However, it should be understood that this overview is notan exhaustive overview of the present disclosure. It is not intended todetermine a critical part or an important part of the presentdisclosure, nor to limit the scope of the present disclosure. An objectof the overview is only to give some concepts about the presentdisclosure in a simplified manner, which serves as a preface of a moredetailed description described later.

According to an aspect of the present application, a device for a userequipment side in wireless communications is provided, and the deviceincludes: an information acquiring unit, configured to acquireinformation of a cell specific dynamic offset of a serving cell of theuser equipment and/or a cell specific dynamic offset of a neighboringcell of the user equipment, which is used for radio resource management,wherein the cell specific dynamic offset is related to transmissioncapability of a corresponding cell, and the transmission capabilityincludes at least one of a multi-antenna gain of the cell and a loadcondition of the cell; a measuring unit, configured to measure referencesignals of the serving cell and the neighboring cell; and a cellreselection/measurement reporting unit, configured to perform, based onthe cell specific dynamic offset and measurement results on the servingcell and the neighboring cell, cell reselection or measurementreporting, according to a connection state of the user equipment.

A device for a base station side in wireless communications is providedaccording to another aspect of the present disclosure, and the deviceincludes: an instruction generating unit, configured to generateinstruction information containing a cell specific dynamic offset of aserving cell of the base station and/or a cell specific dynamic offsetof a neighboring cell of the base station, which is used for radioresource management, so as to instruct a user equipment served by thebase station, wherein the cell specific dynamic offset is related totransmission capability of a corresponding cell, and the transmissioncapability includes at least one of a multi-antenna gain of the cell anda load condition of the cell; and a radio resource management unit,configured to perform, based on the cell specific dynamic offset, radioresource management on the user equipment.

A device for a base station side in wireless communications is providedaccording to yet another aspect of the present disclosure, and thedevice includes: a communication unit, configured to interchange, with aneighboring base station, information of a cell specific dynamic offsetof a respective serving cell used for radio resource management, whereinthe cell specific dynamic offset is related to transmission capabilityof a respective cell, and the transmission capability includes at leastone of a multi-antenna gain of the cell and a load condition of thecell; and a radio resource management unit, configured to perform, basedon the information of the cell specific dynamic offset of the servingcell of the base station and the cell specific dynamic offset of theserving cell of the neighboring base station, radio resource managementon a user equipment of the base station.

A method for a user equipment side in wireless communications isprovided according to another aspect of the present disclosure, and themethod includes: acquiring information of a cell specific dynamic offsetof a serving cell of the user equipment and/or a cell specific dynamicoffset of a neighboring cell of the user equipment, which is used forradio resource management, wherein the cell specific dynamic offset isrelated to transmission capability of a corresponding cell, and thetransmission capability includes at least one of a multi-antenna gain ofthe cell and a load condition of the cell; measuring reference signalsof the serving cell and the neighboring cell; performing, based on thecell specific dynamic offset and measurement results on the serving celland the neighboring cell, cell reselection or measurement reporting,according to a connection state of the user equipment.

A method for a base station side in wireless communications is providedaccording to another aspect of the present disclosure, the methodincludes: generating instruction information containing a cell specificdynamic offset of a serving cell of the base station and/or a cellspecific dynamic offset of a neighboring cell of the base station, whichis used for radio resource management, so as to instruct a userequipment served by the base station, wherein the cell specific dynamicoffset is related to transmission capability of a corresponding cell,and the transmission capability includes at least one of a multi-antennagain of the cell and a load condition of the cell; and performing, basedon the cell specific dynamic offset, radio resource management on theuser equipment.

A method for a base station side in wireless communications is providedaccording to an aspect of the present disclosure, and the methodincludes: interchanging, with a neighboring base station, information ofa cell specific dynamic offset of a respective serving cell used forradio resource management, wherein the cell specific dynamic offset isrelated to transmission capability of a respective cell, and thetransmission capability includes at least one of a multi-antenna gain ofthe cell and a load condition of the cell; and performing, based on theinformation of the cell specific dynamic offset of the serving cell ofthe base station and the cell specific dynamic offset of the servingcell of the neighboring base station, radio resource management on auser equipment of the base station.

A device for a user equipment side in wireless communications is furtherprovided according to another aspect of the present disclosure, and thedevice includes one or more processors configured to: acquireinformation of a cell specific dynamic offset of a serving cell of theuser equipment and/or a cell specific dynamic offset of a neighboringcell of the user equipment, which is used for radio resource management,wherein the cell specific dynamic offset is related to transmissioncapability of a corresponding cell, and the transmission capabilityincludes at least one of a multi-antenna gain of the cell and a loadcondition of the cell; measure reference signals of the serving cell andthe neighboring cell; and perform, based on the cell specific dynamicoffset and measurement results on the serving cell and the neighboringcell, cell reselection or measurement reporting, according to aconnection state of the user equipment.

A device for a base station side in wireless communications is providedaccording to another aspect of the present disclosure, the deviceincludes one or more processors configured to: generate instructioninformation containing a cell specific dynamic offset of a serving cellof the base station and/or a cell specific dynamic offset of aneighboring cell of the base station, which is used for radio resourcemanagement, so as to instruct a user equipment served by the basestation, wherein the cell specific dynamic offset is related totransmission capability of a corresponding cell, and the transmissioncapability includes at least one of a multi-antenna gain of the cell anda load condition of the cell; and perform, based on the cell specificdynamic offset, radio resource management on the user equipment.

A device for a base station side in wireless communications is providedaccording to another aspect of the present disclosure, and the deviceincludes one or more processors configured to: interchange, with aneighboring base station, information of a cell specific dynamic offsetof a respective serving cell used for radio resource management, whereinthe cell specific dynamic offset is related to transmission capabilityof a respective cell, and the transmission capability includes at leastone of a multi-antenna gain of the cell and a load condition of thecell; and perform, based on the information of the cell specific dynamicoffset of the serving cell of the base station and the cell specificdynamic offset of the serving cell of the neighboring base station,radio resource management on a user equipment of the base station.

Computer program codes and a computer program product for implementingthe method for the user equipment side in wireless communications andthe method for the base station side in wireless communicationsdescribed above, and a computer readable storage medium on which thecomputer program codes for implementing the method for the userequipment side in wireless communications and the method for the basestation side in wireless communications described above are recorded arefurther provided according to other aspects of the present disclosure.

The information of the cell specific dynamic offset is taken intoaccount in cell reselection/measurement report in the device and themethod according to the present disclosure, thereby allowing selecting acell with better actual transmission performance.

These and other advantages of the present disclosure will be moreapparent by illustrating in detail a preferred embodiment of the presentinvention in conjunction with accompanying drawings below.

BRIEF DESCRIPTION OF THE DRAWINGS

To further set forth the above and other advantages and features of thepresent invention, detailed description will be made in the followingtaken in conjunction with accompanying drawings in which identical orlike reference signs designate identical or like components. Theaccompanying drawings, together with the detailed description below, areincorporated into and form a part of the specification. It should benoted that the accompanying drawings only illustrate, by way of example,typical embodiments of the present invention and should not be construedas a limitation to the scope of the invention. In the accompanyingdrawings.

FIG. 1 is a structural block diagram showing a device for a userequipment side in wireless communications according to an embodiment ofthe present disclosure;

FIG. 2 is a structural block diagram showing a device for a userequipment side in wireless communications according to an embodiment ofthe present disclosure;

FIG. 3 is a structural block diagram showing a device for a base stationside in wireless communications according to an embodiment of thepresent disclosure;

FIG. 4 is a structural block diagram showing a device for a base stationside in wireless communications according to an embodiment of thepresent disclosure;

FIG. 5 is a flowchart showing a method for a user equipment side inwireless communications according to an embodiment of the presentdisclosure;

FIG. 6 is a flowchart showing a method for a base station side inwireless communications according to an embodiment of the presentdisclosure;

FIG. 7 is a flowchart showing a method for a base station side inwireless communications according to an embodiment of the presentdisclosure;

FIG. 8 is an exemplary block diagram illustrating the structure of ageneral purpose personal computer capable of realizing the method and/ordevice and/or system according to the embodiments of the presentinvention;

FIG. 9 is a block diagram showing an example of schematic configurationof an evolved node B (eNB) in which the technology according to thepresent disclosure is applied; and

FIG. 10 is a block diagram showing an example of schematic configurationof a terminal device.

DETAILED DESCRIPTION OF EMBODIMENTS

An exemplary embodiment of the present invention will be describedhereinafter in conjunction with the accompanying drawings. For thepurpose of conciseness and clarity, not all features of an embodimentare described in this specification. However, it should be understoodthat multiple decisions specific to the embodiment have to be made in aprocess of developing any such embodiment to realize a particular objectof a developer, for example, conforming to those constraints related toa system and a business, and these constraints may change as theembodiments differs. Furthermore, it should also be understood thatalthough the development work may be very complicated andtime-consuming, for those skilled in the art benefiting from the presentdisclosure, such development work is only a routine task.

Here, it should also be noted that in order to avoid obscuring thepresent invention due to unnecessary details, only a device structureand/or processing steps closely related to the solution according to thepresent invention are illustrated in the accompanying drawing, and otherdetails having little relationship to the present invention are omitted.

First Embodiment

FIG. 1 is a structural block diagram showing a device 100 for a userequipment side in wireless communications according to an embodiment ofthe present disclosure, and the device 100 includes: an informationacquiring unit 101, configured to acquire information of a cell specificdynamic offset of a serving cell of the user equipment and/or a cellspecific dynamic offset of a neighboring cell of the user equipment,which is used for radio resource management, wherein the cell specificdynamic offset is related to transmission capability of a correspondingcell, and the transmission capability comprises at least one of amulti-antenna transmission performance gain of the cell and a loadcondition of the cell; a measuring unit 102, configured to measurereference signals of the serving cell and the neighboring cell; and acell reselection/measurement reporting unit 103, configured to perform,based on the cell specific dynamic offset and measurement results on theserving cell and the neighboring cell, cell reselection or measurementreporting, according to a connection state of the user equipment. In anexisting LTE system, a measurement report value of the user equipmentfor a radio resource management operation such as cell handover is onlywith respect to a channel corresponding to a single antenna port, and amulti-antenna transmission performance gain of the base station of thecell is neglected. Therefore, the following situation may occur: theuser equipment accesses to a cell actually having a poor performance dueto a small multi-antenna transmission performance gain rather than acell actually having a good performance due to a great multi-antennatransmission performance gain.

In the device 100, the information acquiring unit 101 acquires theinformation of the cell specific dynamic offset of the serving cell ofthe user equipment and/or the cell specific dynamic offset of theneighboring cell of the user equipment, which is used for radio resourcemanagement. The cell reselection/measurement report unit 103 performsthe cell reselection or the measurement report with the information ofthe cell specific dynamic offset, thereby more accurately determining acell having better actual performance. The cell specific dynamic offsetmay change dynamically due to being specific to the cell, and differentcells generally have different dynamic offset values.

Specifically, the information acquiring unit 101 can acquire theinformation of the cell specific dynamic offset of both the serving cell(the current cell) and the neighboring cell, or can acquire theinformation of the cell specific dynamic offset of only one of theserving cell and the neighboring cell. For example, in measurementreport event configuration for cell handover, only cell specific dynamicoffset of the neighboring cell can be acquired, since the base stationcan naturally know a specific situation of the current cell and takesthe situation of the current cell into account when making radioresource management decision. In cell reselection, for example, theinformation acquiring unit 101 can only acquire the cell specificdynamic offset of the current cell, for example, and the cellreselection/measurement report unit 103 can add the measurement resultof the current cell with the cell specific dynamic offset, and comparethe result with the measurement result of other cells, so as todetermine a cell to be accessed, so that frequent cell reselection canbe avoided.

The cell reselection/measurement report unit 103 performs cellreselection or measurement report based on the cell specific dynamicoffset and the measurement result of the measuring unit 102, accordingto a connection state of the user equipment such as whether the userequipment is in a radio resource control (RRC) connected state. Forexample, measurement report is performed in the RRC connected state, andcell reselection is performed in a RRC unconnected (idle) state.

In an example, the measurement result of the measuring unit 102 includesa measurement value related to at least one of reference signalreceiving power (RSRP) and reference signal receiving quality (RSRQ).

For example, the cell reselection/measurement report unit 103 may beconfigured to rank measured cells based on the information of the cellspecific dynamic offset and the measurement results described above, anddetermine a cell to be accessed based on a ranking result. As anexample, the cell reselection/measurement report unit 103 can combinethe information of the cell specific dynamic offset of each cell with ameasurement result of the cell to acquire transmission performance ofthe cell, and determine a cell with the best transmission performance asthe cell to be accessed. Alternatively, the cell reselection/measurementreport unit 103 can determine a cell with the best transmissionperformance and where signaling transmission can be ensured as a cell tobe accessed, an such an example is suitable for a situation where somesignaling, for example control signaling such as PDCCH signaling wouldnot be subjected to multi-antenna processing and thus would not benefitfrom the multi-antenna gain. Therefore, it is required that receivingquality of the user equipment for the signaling achieves a certainlevel, for example, the measurement result itself is required to achievea certain threshold.

For example, in the cell reselection, the user equipment can rank themeasured cells based on the acquired information of the cell specificdynamic offset and the measurement results, and select a cell with thebest transmission performance to be accessed. It can be understood thatan existing cell reselection rule can be further combined based on thecell reselection idea of the present disclosure, which is not limited inthe present disclosure.

In a specific example, the user equipment measures reference signals ofthe serving cell and the neighboring cell, and acquires measurementvalues Q_(meas,s) and Q_(meas,n) represented by RSRP, and ranks thecells based on a cell reselection parameter including the cell specificdynamic offset notified by the base station according to the equationsbelow:

R _(s′) =Q _(meas,s) +Q _(Hyst) −Q _(offsettemp) +Q _(offsetdyn,s)  (1)

R _(n′) =Q _(meas,s) −Q _(offset) −Q _(offsettemp) +Q_(offsetdyn,n)  (2)

Specifically, R_(s′) represents a R reference value of the serving cellfor participating in cell ranking. R_(n′) represents a R reference valueof the neighboring cell for participating in cell ranking,Q_(offsetdyn,s) represents a cell specific dynamic offset of the servingcell, and Q_(offsetdyn,n) represents a cell specific dynamic offset ofthe neighboring cell. In addition, as specified in technology standardsTS36.331 and TS25.331 of 3GPP, Q_(Hyst) represents a hysteresis value ofa ranking rule, Q_(offset) represents an offset or a frequency specificoffset between the serving cell and the neighboring cell of OAM staticconfiguration based on whether the two cells are intra-frequency cellsor inter-frequency cells, respectively, Q_(offsettemp) represents atemporary offset value common for all cells. The user equipment ranksall cells meeting the S criterion based on the R reference valuescalculated according to the equation above, and selects an optimal cellranked in the first place to execute the cell reselection operation insome examples.

In another optional example, the user equipment calculates referencevalues R_(s) and R_(n) according to the R criterion in existingstandard, for example, according to the equations below:

R _(s) =Q _(meas,s) +Q _(Hyst) −Q _(offsettemp)  (3)

R _(n) =Q _(meas,n) −Q _(offset) −Q _(offsettemp)  (4)

Specifically, the same symbol in equations (3) and (4) has the samemeaning as that in equations (1) and (2). Then, the user equipmentselects multiple candidate neighboring cells having a reference valueR_(n) greater than R_(s) of the serving cell, calculates R_(n′) for themultiple candidate neighboring cells respectively, and performs cellranking. A neighboring cell with the greatest R_(n′) value is used as areselection object, and therefore, a cell with the best actualtransmission performance is reselected. In this example, the userequipment does not need to use the cell specific dynamic offsetQ_(offsetdyn,s) of the serving cell, and therefore, it is possible notto set the cell specific dynamic offset value to reduce signalingoverhead.

Other combined or deformed way can be designed by those skilled in theart based on the conventional technology and the above example, forexample, the user equipment receives, from the base station, only adifference between Q_(offsetdyn,s) and Q_(offsetdyn,n) as the cellspecific dynamic offset of the corresponding neighboring cell, andcalculates R_(n′) with the difference between Q_(offsetdyn,s) andQ_(offsetdyn,n) while ranking the cells in combination with R_(s), whichare not enumerated here.

Specifically, the information acquiring unit 101 can acquire theinformation of the cell specific dynamic offset based on systeminformation or historical information recorded in the user equipment.For example, the system information is acquired through a broadcastchannel (for example BCCH), and the historical information refers to forexample the information of the cell specific dynamic offset of a certaincell and the neighboring cell acquired from the cell when the userequipment accesses to the cell previously. Alternatively, the historicalinformation may be the information of the cell specific dynamic offsetof a cell recorded every time the user equipment accesses to the cell.The information acquiring unit 101 uses the system information or thehistorical information as the information of the cell specific dynamicoffset of the neighboring cell in the case that the user equipment is ina RRC idle state, to perform for example cell reselection.

In addition, the information acquiring unit 101 acquires the informationof the cell specific dynamic offset of the serving cell and the cellspecific dynamic offset of the neighboring cell by receiving a RRCsignaling from the base station of the serving cell. For example, theinformation acquiring unit 101 acquires an ID of the neighboring celland the corresponding information of the cell specific dynamic offsetwhen the user equipment establishes a RRC connection with the servingcell, for example, acquires the information of the cell specific dynamicoffset of each cell in an information elementSystemInformationBlockType4 and/or SystemInformationBlockType5 of a RRCmessage. The information of the cell specific dynamic offset of theneighboring cell measured currently is determined with the previouslyrecorded information of the cell specific dynamic offset of theneighboring cell and the acquired ID of the neighboring cell in the RRCidle state.

The multi-antenna transmission performance gain in the above may includefor example a pre-coding gain and/or a beam-forming gain of the cell. Inaddition, in an example, the cell specific dynamic offset is alsorelated to a load of the cell, specifically, the greater the load is,the smaller the vale of the offset is.

Second Embodiment

An example of applying the device for a user equipment side in wirelesscommunications according to the present disclosure to measurement reportis described below. Generally, a base station performs radio resourcemanagement (RRM) measurement configuration on the user equipment throughhigh-layer signaling, and makes, based on RRM measurement results on aneighboring cell and the current cell fed back by the user equipmentaccording to the configuration, a radio resource management decisionsuch as cell handover, dual-connection starting or adjusting, carrieraggregation starting or carrier combination adjusting.

In the embodiment, the information acquiring unit 101 is configured toacquire measurement configuration information from a serving cell of theuser equipment in the case that a connection state of radio resourcecontrol (RRC) of the user equipment is connected. The measurementconfiguration information contains for example a cell specific dynamicoffset and measurement report configuration about a report triggeringevent which takes the cell specific dynamic offset into account.

It should be noted that the report triggering event refers to an eventnewly defined in the present disclosure which takes the cell specificdynamic offset into account, which will be described in detailhereinafter. In other words, the information acquiring unit 101 acquiresinformation on the measurement report configuration including atriggering condition and so on for the report triggering event whichtakes the cell specific dynamic offset into account and the relatedinformation of the cell specific dynamic offset from the serving cell(the base station). For example, the above measurement configurationinformation containing the information of the cell specific dynamicoffset may be contained in a RRC signaling, specifically in aMeasObjectEUTRA (for example in CellsToAddMod) of the RRC signaling, andthe information related to the measurement report configuration may becontained in measconfig IE.

As an example, the cell reselection/measurement report unit 103 mayinclude: a measurement report triggering module, configured to trigger ameasurement report based at least on the cell specific dynamic offset,the measurement result and the measurement report configuration. Forexample, in the case that the cell specific dynamic offset and themeasurement result for one or more cells meet a measurement report eventdefined in the measurement report configuration, the measurement reporttriggering module incorporates an ID of the cell into the measurementreport and triggers the measurement report, for example, reports aneighboring cell with the best transmission performance to the basestation through the measurement report, to be switched to theneighboring cell.

As another example, the cell reselection/measurement report unit 103 mayinclude a measurement report generating module, configured to contain ameasurement result of the neighboring cell meeting the report triggeringevent which takes the cell specific dynamic offset into account in themeasurement report. In this case, rather than performing determinationof a target cell on the side of the user equipment, the user equipmentreports the measurement result to the base station. For example, thetarget cell is selected by the base station to perform a managementoperation such as cell handover, dual-connection, carrier aggregation orthe like.

Third Embodiment

An example of applying a device for a user equipment side in wirelesscommunications according to present disclosure to cell reselection isdescribed below. In the example, the user equipment is in a RRC idlestate, and the information acquiring unit 101 can acquire theinformation of the cell specific dynamic offset for example via thesystem information or the historical information described above. Thecell reselection/measurement report unit 103 can determine, based on theinformation of the cell specific dynamic offset and the measurementresult of the measuring unit 102, a cell with the best transmissionperformance as a cell to be accessed, for example, determine by a cellranking way in the first embodiment.

In addition, as shown in FIG. 2, besides the components of the device100 described with reference to FIG. 1, the device 200 according to theembodiment may further 20 include a capability flag transmitting unit201, configured to transmit, after the cell reselection is completed, anequipment capability flag indicating that the cell specific dynamicoffset is taken into account when determining to a target cell of thecell reselection. In this way, the target cell may preferably configurea multi-antenna transmission scheme for the user equipment.

For example, the capability flag transmitting unit 201 may be configuredto transmit the equipment capability flag in the RRC signaling. Asanother example, the capability flag transmitting unit 201 may beconfigured to transmit the equipment capability flag in random accessrequest signaling.

The device 100 and the device 200 described above take the informationof the cell specific dynamic offset into account when performing thecell reselection or measurement report, thereby accurately reflectingactual performance of the cell and facilitating more accuratedecision-making.

Fourth Embodiment

FIG. 3 is a structural block diagram showing a device 300 for a basestation side in wireless communications according to an embodiment ofthe present disclosure, and the device 300 includes: an instructiongenerating unit 301, configured to generate instruction informationcontaining a cell specific dynamic offset of a serving cell of the basestation and/or a cell specific dynamic offset of a neighboring cell ofthe base station, which is used for radio resource management, so as toinstruct a user equipment served by the base station, wherein the cellspecific dynamic offset is related to transmission capability of acorresponding cell, and the transmission capability includes at leastone of a multi-antenna transmission performance gain of the cell and aload condition of the cell, and a radio resource management unit 302,configured to perform radio resource management on the user equipmentbased on the cell specific dynamic offset.

As described above, the multi-antenna transmission performance gain mayinclude a pre-coding gain and/or a beam-forming gain of the cell. Thecell specific dynamic offset may also be related to a load of the cell.The greater the load is, the smaller a value of the offset is.Specifically, the multi-antenna transmission performance gain of thecell and the load of the cell change dynamically based on an operatingstate of the corresponding cell, for example, the multi-antennatransmission performance of a cell where multiple antennas are deployedmay change with the number of users served currently.

In the device 300, the instruction generating unit 301 generatesinstruction information containing the cell specific dynamic offset, andthe radio resource management unit 302 performs radio resourcemanagement such as cell handover, dual-connection and carrieraggregation based on the cell specific dynamic offset.

As shown in a dash-line block of FIG. 3, the device 300 may furtherinclude a communication unit 303 configured to transmit the instructioninformation to the user equipment served by the base station, andreceive an access request and a measurement report from the userequipment.

In an example, the instruction generating unit 301 contains the cellspecific dynamic offset in system information, and the communicationunit 303 transmits the system information containing the cell specificdynamic offset through a broadcast channel. For example, the systeminformation is SIB, a dynamic offset item of the current cell(q-OffsetDyn) can be added in cellReselectionInfoCommon inSystemInformationBlockType3, and a dynamic offset item of aintra-frequency neighboring cell (q-OffsetDyn) can be added inIntraFreqNeighCellInfo in SystemInformationBlockType4, and a dynamicoffset item of a inter-frequency neighboring cell (q-OffsetDyn) can beadded in InterFreqNeighCellInfo in SystemInformationBlockType5. Forexample, in the case that the user equipment in a RRC idle state, it canreceive the system information so as to perform an operation such ascell reselection.

In another example, in the case that the user equipment is already in aRRC connected state, the instruction generating unit 301 contains thecell specific dynamic offset in a RRC signaling, and the communicationunit 303 transmits the RRC signaling containing the cell specificdynamic offset through a data channel. As described above, for example,the cell specific dynamic offset may be contained in MeasObjectEUTRA(for example in CellsToAddMod) of the RRC signaling. In addition, thecell specific dynamic offset may be contained in a system informationblock of the RRC, specifically, in the SystemInformationBlockType3, theSystemInformationBlockType4 or the SystemInformationBlockType5 describedabove.

In addition, the instruction generating unit 301 may also contain thecell specific dynamic offset and measurement report configuration abouta report triggering event which takes the cell specific dynamic offsetinto account in the measurement configuration information of the RRCsignaling, for measurement report of the user equipment. That is, thetransmitted RRC signaling further includes measurement reportconfiguration for the user equipment. As described above, theinformation of the measurement report configuration may be contained inmeasconfig IE. In addition, the measconfig may further include a list ofcells which the base station expects to be measured by the userequipment, parameters of respective measurement report events and thelike. When the user equipment completes measuring the cells according toa requirement of the measurement configuration, it determines, based ona parameter of the event, whether the measurement result meets acorresponding report triggering event, and an ID of the cell, an ID ofthe report triggering event met by the measurement result and/or theparticular measurement result are reported in the case that themeasurement result meets the report triggering event.

As an example, the radio resource management unit 302 determines themeasurement result on the neighboring cell contained in the measurementreport from the user equipment, and determines, based on the measurementresult on the neighboring cell and the cell specific dynamic offsetcorresponding to the neighboring cell, a target access cell for the userequipment. In this example, the target access cell is determined on theside of the base station. In addition, the radio resource managementunit 302 can determine, based on the report triggering eventcorresponding to the measurement result, the target access cell as atleast one of a switch target cell, a dual-connection target cell or acarrier aggregation target cell of the user equipment. For example, anew report triggering event for handover, dual-connection and carrieraggregation, which takes the cell specific dynamic offset into accountmay be set, and a unique ID is allocated to the new report triggeringevent.

It should be noted that the report triggering event described here is anevent newly defined in the present disclosure which takes the cellspecific dynamic offset into account. For example, new events A7 and A8can be defined. Specifically, A7 includes two entering conditions:

Mn+Ofn+Ocn+Odn−Hys>Mp+Ofp+Ocp+Ods+Off  (5)

Mn+Ofn+Ocn−Hys>first threshold  (6)

where Mn is a measurement result on the neighboring cell without takingthe offset into account, Ofn is a frequency specific offset for afrequency of the neighboring cell, Ocn is a static neighboring cellspecific offset by OAM assignment, Odn is a cell specific dynamic offsetof the neighboring cell introduced in the present disclosure, Hys is ahysteresis parameter of the event, Mp is a measurement result on aprimary cell without taking the offset into account, Ofp is a frequencyspecific offset of a primary frequency; Ocp is a static primary cellspecific offset by OAM assignment, and Ods is a cell specific dynamicoffset of the serving cell introduced in the present disclosure, Of isan offset parameter for the event, and the first threshold may be setfor example in the measconfig. In other words, in the case that the cellmeets the two conditions of the event A7, an ID of the cell and an eventID of A7 and/or the measurement result can be reported. Specifically,the condition (6) ensures a signal quality of transmission of theneighboring cell, for example, which transmission is not subjected tothe multi-antenna processing and thus fails to benefit from themulti-antenna transmission performance gain.

In addition, a leaving condition for the event A7 is also set based onthe idea of the present disclosure in a preferable example:

Mn+Ofn+Ocn+Odn−Hys<Mp+Ofp+Ocp+Ods+Off  (7)

Mn+Ofn+Ocn−Hys<0  (8),

By means of this, the user equipment is configured to report acorresponding measurement result by triggering event A7 configurationbased on the above measurement report, and the base station determineswhether to perform the switch of the primary cell Pcell/PScell andselection of a switch target cell based on the measurement report underthis event.

Event A8 includes two entering conditions as follows:

Mn+Ocn+Odn−Hys>Ms+Ocs+Ods+Off  (9)

Mn+Ocn−Hys>second threshold  (10)

In addition, a leaving condition for the event A8 is set according tothe idea of the present disclosure in the preferable example:

Mn+Ocn+Odn−Hys<Ms+Ocs+Ods+Off  (11)

Mn+Ocn−Hys<0  (12)

where the same symbol in these equations has the same meaning as that inequations (5) and (6), and the second threshold may also be set inmeasconfig for example. Similarly, the user equipment is configured toreport a corresponding measurement result by triggering event A8configuration based on the above measurement report, for example, canreport an ID of the cell, an event ID of A8 and/or the measurementresult. The base station determines, based on the measurement reportunder the event, whether to add, delete or replace a secondary cellScell.

Other combined or deformed way can be designed by those skilled in theart based on the conventional technology and the above example, forexample, the user equipment receives only a difference between Qdn andQds as the cell specific dynamic offset of the corresponding neighboringcell from the base station, which is not enumerated here.

In addition, in the case that the device 300 operates as a target accessbase station of the user equipment, the communication unit 303 may befurther configured to receive, from the user equipment, an equipmentcapability flag indicating that the user equipment has taken the cellspecific dynamic offset into account. In the case that the equipmentcapability flag indicates that the access request has taken the cellspecific dynamic offset into account, the radio resource management unit302 is configured to preferentially determine a multi-antennatransmission scheme for the user equipment.

For example, after the user equipment completes cell reselection, theabove equipment capability flag is transmitted to a communication unit303 of a selected cell. In subsequent transmission, the radio resourcemanagement unit 302 determines a multi-antenna transmission scheme forthe user equipment preferentially, since the equipment capability flagindicates that the multi-antenna transmission performance gain of thecell is taken into account when selecting the cell.

The device 300 according to the embodiment implements radio resourcemanagement based on the cell specific dynamic offset, and improvesresource utilization efficiency.

Fifth Embodiment

FIG. 4 is a structural block diagram showing a device 400 for a basestation side in wireless communications according to an embodiment ofthe present disclosure, and the device 400 includes: a communicationunit 401, configured to interchange, with a neighboring base station,information of a cell specific dynamic offset of a respective servingcell used for radio resource management, wherein the cell specificdynamic offset is related to transmission capability of a respectivecell, and the transmission capability comprises at least one of amulti-antenna transmission performance gain of the cell and a loadcondition of the cell; and a radio resource management unit 402configured to perform, based on the information of the cell specificdynamic offset of the serving cell of the base station and the cellspecific dynamic offset of the serving cell of the neighboring basestation, radio resource management on a user equipment of the basestation.

In the device 400, the communication unit 401 enables interchange of theinformation of the cell specific dynamic offset of the respectiveserving cell with each other between neighboring base stations, so thatthe base station can provide the information of the cell specificdynamic offset of the cells of the base station itself and theneighboring base station to a user equipment of a cell served by thebase station. Alternatively, the base station performs radio resourcemanagement with the information of the cell specific dynamic offset. Forexample, the cell specific dynamic offset of each cell in the presentdisclosure changes dynamically based on an operating state of the cell,for example, the multi-antenna transmission performance gain can changewith the number of the served users. Beam-forming can be used to improvetransmission quality in the case that the number of users is small, andthe transmission service of beam-forming can not be provided in the casethat the number of users is great. The load of the cell also changesaccording to a particular transmission service state of the cell.Therefore, in the present disclosure, it is designed that theneighboring base stations directly interchange the information of thecell specific dynamic offsets with each other, thereby ensuring realtime of the information, and improving accuracy of the radio resourcemanagement compared with a current way of acquiring a staticcharacteristic of the neighboring cell by OAM configuration.

In an example of the present disclosure, rather than notifying the userequipment of the information of the cell specific dynamic offset, thebase station overlaps the cell specific dynamic offset within the basestation after receiving the measurement result from the user equipment,to perform the radio resource management operation such as cellhandover.

In an example, the communication unit 401 corresponds to an X2communication interface, and the communication unit 401 interchanges theinformation of the cell specific dynamic offset via an information bitin Cell Information Item of an X2 message.

The device 400 according to the embodiment can implement radio resourcemanagement based on the cell specific dynamic offset, and improveresource utilization efficiency.

Sixth Embodiment

In the process of describing the device for a user equipment side and abase station side in wireless communications in the embodimentsdescribed above, obviously, some processing and methods are alsodisclosed. Hereinafter, an overview of the methods is given withoutrepeating some details disclosed above. However, it should be notedthat, although the methods are disclosed in a process of describing thedevice for a user equipment side and a base station side in wirelesscommunications, the methods do not certainly employ or are not certainlyexecuted by the aforementioned components. For example, the embodimentsof the device for a user equipment side and a base station side inwireless communications may be partially or completely implemented withhardware and/or firmware, the method for a user equipment side and abase station side in wireless communications described below may beexecuted by a computer-executable program completely, although thehardware and/or firmware of the device for a user equipment side and abase station side in wireless communications can also be used in themethods.

FIG. 5 is a flowchart showing a method for a user equipment side inwireless communications according to an embodiment of the presentdisclosure, the method includes: acquiring information of a cellspecific dynamic offset of a serving cell of the user equipment and/or acell specific dynamic offset of a neighboring cell of the userequipment, which is used for radio resource management (S11), whereinthe cell specific dynamic offset is related to transmission capabilityof a corresponding cell, and the transmission capability includes atleast one of a multi-antenna transmission performance gain of the celland a load condition of the cell, measuring reference signals of theserving cell and the neighboring cell (S12), and performing, based onthe cell specific dynamic offset and measurement results on the servingcell and the neighboring cell, cell reselection or measurementreporting, according to a connection state of the user equipment (S13).

Specifically, the multi-antenna transmission performance gain includes apre-coding gain and/or a beam-forming gain of the cell. The cellspecific dynamic offset can also be related to load of the cell,specifically, the greater the load is, the smaller a value of the offsetis.

In step S11, the information of the cell specific dynamic offset isacquired via system information or historical information recorded inthe user equipment. In addition, the information of the cell specificdynamic offset of the serving cell and the cell specific dynamic offsetthe neighboring cell can also be acquired by receiving RRC signalingfrom the base station of the serving cell.

The measurement result acquired in step S12 may include a measurementvalue related to at least one of reference signal receiving power andreference signal receiving quality.

In step S13, the measured cells can be ranked based on the informationof the cell specific dynamic offset and the measurement results, and acell to be accessed is determined based on a ranking result.

In the case that a radio resource control connection state of the userequipment is connected, measurement configuration information from theserving cell of the user equipment is acquired in step S11. Themeasurement configuration information includes the cell specific dynamicoffset and measurement report configuration about a report triggeringevent which takes the cell specific dynamic offset into account. Asdescribed above, multiple new report triggering events which take thecell specific dynamic offset into account may be defined.

As an example, the measurement configuration information containing theinformation of the cell specific dynamic offset is contained in the RRCsignaling.

In step S13, the measurement report is triggered based at least on thecell specific dynamic offset, the measurement result and the measurementreport configuration. A measurement result on the neighboring cell whichmeets the report triggering event which takes the cell specific dynamicoffset into account can also be contained in the measurement report.

In the case that cell reselection is performed in step S13, as shown ina dash-line block of FIG. 5, the above method further includes step S14:transmitting, after the cell reselection is completed, an equipmentcapability flag indicating that the cell specific dynamic offset istaken into account when determining to a target cell of the cellreselection. For example, the equipment capability flag may betransmitted in the RRC signaling.

FIG. 6 is a flowchart showing a method for a base station side inwireless communications according to an embodiment of the presentdisclosure, and the method includes: generating instruction informationcontaining a cell specific dynamic offset of a serving cell of the basestation and/or a cell specific dynamic offset of a neighboring cell ofthe base station, which is used for radio resource management (S21), soas to instruct a user equipment served by the base station, wherein thecell specific dynamic offset is related to transmission capability of acorresponding cell, and the transmission capability includes at leastone of a multi-antenna transmission performance gain of the cell and aload condition of the cell, and performing, based on the cell specificdynamic offset, radio resource management on the user equipment (S25).

Specifically the multi-antenna transmission performance gain includes apre-coding gain and/or a beam-forming gain of the cell. The cellspecific dynamic offset is further related to the load of the cell,wherein the greater the load is, the small a value of the offset is.

In an example, as shown in a dash-line block of FIG. 6, the above methodfurther includes: transmitting the instruction information to the userequipment served by the base station (S22), and receiving an accessrequest or a measurement report from the user equipment (S23).

For example, the cell specific dynamic offset can be contained in thesystem information in step S21, and the system information containingthe cell specific dynamic offset is transmitted on a broadcast channelin step S22.

In addition, the cell specific dynamic offset can also be contained in aRRC signaling in step S21, and the RRC signaling containing the cellspecific dynamic offset is transmitted on a data channel in step S22.For example, the cell specific dynamic offset and measurement reportconfiguration about a report triggering event which takes the cellspecific dynamic offset into account can be contained in measurementconfiguration information of the RRC signaling, for the measurementreport of the user equipment.

For example, when performing cell reselection, an access request fromthe user equipment is received in step S23. In this case, as shown inanother dash-line block of FIG. 6, the method may further include stepS24: receiving the equipment capability flag indicating that the userequipment has taken the cell specific dynamic offset into account fromthe user equipment. In the case that the equipment capability flagindicates that the access request has taken the cell specific dynamicoffset into account, a multi-antenna transmission scheme is determinedfor the user equipment preferentially.

In addition, for example, in a scenario such as cell reselection, ameasurement report is received from the user equipment in step S23, andthe measurement report is reported by the user equipment based on themeasurement configuration information. In an example, in step S25, ameasurement result on the neighboring cell contained in the measurementreport from the user equipment is determined, and a target access cellof the user equipment is determined based on the measurement result onthe neighboring cell and the corresponding cell specific dynamic offset.

In addition, the target access cell can also be determined as at leastone of a switch target cell, a dual-connection target cell or a carrieraggregation target cell of the user equipment, based on a reporttriggering event corresponding to the measurement result.

FIG. 7 is a flowchart showing a method for a base station side inwireless communications according to another embodiment of the presentdisclosure, and the method includes: interchanging, with a neighboringbase station, information of a cell specific dynamic offset of arespective serving cell used for radio resource management (S31),wherein the cell specific dynamic offset is related to transmissioncapability of a respective cell, and the transmission capabilityincludes at least one of a multi-antenna transmission performance gainof the cell and a load condition of the cell, and performing, based onthe information of the cell specific dynamic offset of the serving cellof the base station and the cell specific dynamic offset of the servingcell of the neighboring base station, radio resource management on auser equipment of the base station (S32).

For example, the information of the cell specific dynamic offset isinterchanged via an X2 communication interface in step S31,specifically, for example, the information of the cell specific dynamicoffset can be interchanged by an information bit in Cell InformationItem of an X2 message.

It is to be noted that, the above methods can be performed separately orin combination with each other, and the detailed descriptions thereofare described in the first to the third embodiments and are notrepeatedly described herein.

The basic principle of the present invention has been described above inconjunction with particular embodiments. However, as can be appreciatedby those ordinarily skilled in the art, all or any of the steps orcomponents of the method and device according to the invention can beimplemented in hardware, firmware, software or a combination thereof inany computing device (including a processor, a storage medium, etc.) ora network of computing devices by those ordinarily skilled in the art inlight of the disclosure of the invention and making use of their generalcircuit designing knowledge or general programming skills.

It can be understood by those skilled in the art that for example theinformation acquiring unit, the measuring unit, the cellreselection/measurement report unit, the instruction generating unit,the radio resource management unit and the like in the device describedabove may be implemented by one or more processors, and for example thecapability flag transmitting unit, the communication unit and so on canbe implemented by a circuit element such as an antenna, a filter, amodem, a codec and the like.

Therefore, a device (1) a user equipment side in wireless communicationsis further provided according to the present disclosure. The device (1)includes: one or more processors configured to: acquire information of acell specific dynamic offset of a serving cell of the user equipmentand/or a cell specific dynamic offset of a neighboring cell of the userequipment, which is used for radio resource management, wherein the cellspecific dynamic offset is related to transmission capability of acorresponding cell, and the transmission capability comprises at leastone of a multi-antenna transmission performance gain of the cell and aload condition of the cell; measure reference signals of the servingcell and the neighboring cell, and perform, based on the cell specificdynamic offset and measurement results on the serving cell and theneighboring cell, cell reselection or measurement reporting, accordingto a connection state of the user equipment.

In some examples, the device (1) is a user equipment, and can furtherinclude: a transceiver configured to receive the information of the cellspecific dynamic offset and transmit a random access request to theneighboring cell or transmit a measurement report to the serving cell.

A device (2) for a base station side in wireless communications isfurther provided according to the present disclosure. The device (2)includes one or more processors configured to: generate instructioninformation containing a cell specific dynamic offset of a serving cellof the base station and/or a cell specific dynamic offset of aneighboring cell of the base station, which is used for radio resourcemanagement, so as to instruct a user equipment served by the basestation, wherein the cell specific dynamic offset is related totransmission capability of a corresponding cell, and the transmissioncapability comprises at least one of a multi-antenna transmissionperformance gain of the cell and a load condition of the cell; andperform, based on the cell specific dynamic offset, radio resourcemanagement on the user equipment.

A device (3) for a base station side in wireless communications isfurther provided according to the present disclosure. The device (3)includes one or more processors configured to: interchange, with aneighboring base station, information of a cell specific dynamic offsetof a respective serving cell used for radio resource management, whereinthe cell specific dynamic offset is related to transmission capabilityof a respective cell, and the transmission capability comprises at leastone of a multi-antenna transmission performance gain of the cell and aload condition of the cell; and perform, based on the information of thecell specific dynamic offset of the serving cell of the base station andthe cell specific dynamic offset of the serving cell of the neighboringbase station, radio resource management on a user equipment of the basestation.

In some examples, each of the devices (2) and the device (3) is a basestation, and can further include a transceiver configured to transmitthe information of the cell specific dynamic offset to the userequipment. Details related to the devices (1) to device (3) have beengiven in the above embodiments, which are not described repeatedly hereanymore.

In addition, an electronic apparatus (1) is further provided accordingto the present disclosure. The electronic apparatus (1) includescircuitry configured to: acquire information of a cell specific dynamicoffset of a serving cell of the user equipment and/or a cell specificdynamic offset of a neighboring cell of the user equipment, which isused for radio resource management, wherein the cell specific dynamicoffset is related to transmission capability of a corresponding cell,and the transmission capability comprises at least one of amulti-antenna transmission performance gain of the cell and a loadcondition of the cell; measure reference signals of the serving cell andthe neighboring cell; and perform, based on the cell specific dynamicoffset and measurement results on the serving cell and the neighboringcell, cell reselection or measurement reporting, according to aconnection state of the user equipment.

An electronic apparatus (2) is further provided according to the presentdisclosure. The electronic apparatus (2) includes circuitry configuredto: generate instruction information containing a cell specific dynamicoffset of a serving cell of the base station and/or a cell specificdynamic offset of a neighboring cell of the base station, which is usedfor radio resource management, so as to instruct a user equipment servedby the base station, wherein the cell specific dynamic offset is relatedto transmission capability of a corresponding cell, and the transmissioncapability comprises at least one of a multi-antenna transmissionperformance gain of the cell and a load condition of the cell, andperform, based on the cell specific dynamic offset, radio resourcemanagement on the user equipment.

An electronic apparatus (3) is also provided according to the presentdisclosure. The electronic apparatus (3) includes circuitry configuredto: interchange, with a neighboring base station, information of a cellspecific dynamic offset of a respective serving cell used for radioresource management, wherein the cell specific dynamic offset is relatedto transmission capability of a respective cell, and the transmissioncapability comprises at least one of a multi-antenna transmissionperformance gain of the cell and a load condition of the cell; andperform, based on the information of the cell specific dynamic offset ofthe serving cell of the base station and the cell specific dynamicoffset of the serving cell of the neighboring base station, radioresource management on a user equipment of the base station.

Moreover, the present invention further discloses a program product inwhich machine-readable instruction codes are stored. The aforementionedmethods according to the embodiments can be implemented when theinstruction codes are read and executed by a machine.

Accordingly, a memory medium for carrying the program product in whichmachine-readable instruction codes are stored is also covered in thepresent invention. The memory medium includes but is not limited to softdisc, optical disc, magnetic optical disc, memory card, memory stick andthe like.

In the case where the present application is realized by software orfirmware, a program constituting the software is installed in a computerwith a dedicated hardware structure (e.g. the general computer 800 shownin FIG. 18) from a storage medium or network, wherein the computer iscapable of implementing various functions when installed with variousprograms.

In FIG. 8, a central processing unit (CPU) 1801 executes variousprocessing according to a program stored in a read-only memory (ROM)1802 or a program loaded to a random access memory (RAM) 1803 from amemory section 1808. The data needed for the various processing of theCPU 1801 may be stored in the RAM 1803 as needed. The CPU 1801, the ROM1802 and the RAM 1803 are linked with each other via a bus 1804. Aninput/output interface 1805 is also linked to the bus 1804.

The following components are linked to the input/output interface 1805:an input section 1806 (including keyboard, mouse and the like), anoutput section 1807 (including displays such as a cathode ray tube(CRT), a liquid crystal display (LCD), a loudspeaker and the like), amemory section 1808 (including hard disc and the like), and acommunication section 1809 (including a network interface card such as aLAN card, modem and the like). The communication section 1809 performscommunication processing via a network such as the Internet. A driver1810 may also be linked to the input/output interface 1805. If needed, aremovable medium 1811, for example, a magnetic disc, an optical disc, amagnetic optical disc, a semiconductor memory and the like, may beinstalled in the driver 1810, so that the computer program readtherefrom is installed in the memory section 1808 as appropriate.

In the case where the foregoing series of processing is achieved bysoftware, programs forming the software are installed from a networksuch as the Internet or a memory medium such as the removable medium1811.

It should be appreciated by those skilled in the art that the memorymedium is not limited to the removable medium 1811 shown in FIG. 8,which has program stored therein and is distributed separately from theapparatus so as to provide the programs to users. The removable medium1811 may be, for example, a magnetic disc (including floppy disc(registered trademark)), a compact disc (including compact discread-only memory (CD-ROM) and digital versatile disc (DVD), a magnetooptical disc (including mini disc (MD)(registered trademark)), and asemiconductor memory. Alternatively, the memory medium may be the harddiscs included in ROM 1802 and the memory section 1808 in which programsare stored, and can be distributed to users along with the device inwhich they are incorporated.

Application Example

The technology in the present disclosure can be applied to variousproducts.

For example, the devices 300 and 400 on the side of the base station canbe implemented as any type of evolved nodes B (eNB) such as a macro eNBand a small eNB. The small eNB may be an eNB such as a pico eNB, a microeNB, and a home (femto) eNB that covers a cell smaller than a macrocell. Alternatively, the devices 300 and 400 on the side of the basestation may be implemented as any other types of base stations such as aNodeB and a base transceiver station (BTS). The devices 300 and 400 onthe side of the base station may include: a main body (that is alsoreferred to as a base station apparatus) configured to control radiocommunication, and one or more remote radio heads (RRH) disposed in adifferent place from the main body. In addition, various types ofterminals, which will be described below, may each operate as thedevices 300 and 400 on the side of the base station by temporarily orsemi-persistently executing a base station function

For example, the devices 100 and 200 on the side of the user equipmentmay be implemented as a mobile terminal (such as a smart phone, a tabletpersonal computer (PC), a notebook PC, a portable game terminal, aportable/dongle type mobile router, and a digital camera), or anin-vehicle terminal (such as a car navigation apparatus). The terminaldevice 300 may also be implemented as a terminal (also referred to as amachine type communication (MTC) terminal) that performsmachine-to-machine (M2M) communication. Furthermore, the devices 100 and200 on the side of the user equipment may be a radio communicationmodule (such as an integrated circuit module including a single die)mounted on each of the terminals described above.

[I. Application Example Regarding Base Station]

FIG. 9 is a block diagram illustrating a first example of a schematicconfiguration of an eNB to which the technology of the presentdisclosure may be applied. An eNB 800 includes one or more antennas 810and a base station apparatus 820. Each antenna 810 and the base stationapparatus 820 may be connected to each other via an RF cable.

Each of the antennas 810 includes a single or multiple antenna elements(such as multiple antenna elements included in an MIMO antenna), and isused for the base station apparatus 820 to transmit and receive radiosignals. The eNB 800 may include the multiple antennas 810, asillustrated in FIG. 9. For example, the multiple antennas 810 may becompatible with multiple frequency bands used by the eNB 800. AlthoughFIG. 9 illustrates the example in which the eNB 800 includes themultiple antennas 810, the eNB 800 may also include a single antenna810.

The base station apparatus 820 includes a controller 821, a memory 822,a network interface 823, and a radio communication interface 825.

The controller 821 may be, for example, a CPU or a DSP, and operatesvarious functions of a higher layer of the base station apparatus 820.For example, the controller 821 generates a data packet from data insignals processed by the radio communication interface 825, andtransfers the generated packet via the network interface 823. Thecontroller 821 may bundle data from multiple base band processors togenerate the bundled packet, and transfer the generated bundled packet.The controller 821 may have logical functions of performing control suchas radio resource control, radio bearer control, mobility management,admission control, and scheduling. The control may be performed incorporation with an eNB or a core network node in the vicinity. Thememory 822 includes RAM and ROM, and stores a program that is executedby the controller 821, and various types of control data (such as aterminal list, transmission power data, and scheduling data).

The network interface 823 is a communication interface for connectingthe base station apparatus 820 to a core network 824. The controller 821may communicate with a core network node or another eNB via the networkinterface 823. In that case, the eNB 800, and the core network node orthe other eNB may be connected to each other through a logical interface(such as an S1 interface and an X2 interface). The network interface 823may also be a wired communication interface or a radio communicationinterface for radio backhaul. If the network interface 823 is a radiocommunication interface, the network interface 823 may use a higherfrequency band for radio communication than a frequency band used by theradio communication interface 825.

The radio communication interface 825 supports any cellularcommunication scheme such as Long Term Evolution (LTE) and LTE-Advanced,and provides radio connection to a terminal positioned in a cell of theeNB 800 via the antenna 810. The radio communication interface 825 maytypically include, for example, a baseband (BB) processor 826 and an RFcircuit 827. The BB processor 826 may perform, for example,encoding/decoding, modulating/demodulating, andmultiplexing/demultiplexing, and performs various types of signalprocessing of layers (such as L1, medium access control (MAC), radiolink control (RLC), and a packet data convergence protocol (PDCP)). TheBB processor 826 may have a part or all of the above-described logicalfunctions instead of the controller 821. The BB processor 826 may be amemory that stores a communication control program, or a module thatincludes a processor and a related circuit configured to execute theprogram. Updating the program may allow the functions of the BBprocessor 826 to be changed. The module may be a card or a blade that isinserted into a slot of the base station apparatus 820. Alternatively,the module may also be a chip that is mounted on the card or the blade.Meanwhile, the RF circuit 827 may include, for example, a mixer, afilter, and an amplifier, and transmits and receives radio signals viathe antenna 810.

As shown in FIG. 9, the radio communication interface 825 may includethe multiple BB processors 826. For example, the multiple BB processors826 may be compatible with multiple frequency bands used by the eNB 800.The radio communication interface 825 may include the multiple RFcircuits 827, as illustrated in FIG. 9. For example, the multiple RFcircuits 827 may be compatible with multiple antenna elements. AlthoughFIG. 9 illustrates the example in which the radio communicationinterface 825 includes the multiple BB processors 826 and the multipleRF circuits 827, the radio communication interface 825 may also includea single BB processor 826 or a single RF circuit 827.

In the eNB 800 shown in FIG. 9, the communication unit shown in FIG. 3and FIG. 4 may be implemented by a wireless communication interface 825and the wireless communication interface 855 and/or the wirelesscommunication interface 863. At least part of the functions may beimplemented by the controller 821. For example, the controller 821 mayexecute an operation to generate the instruction information containingthe cell specific dynamic offset by executing the function of theinstruction generating unit. The controller 821 may execute an operationto perform wireless resource management based on the cell specificdynamic offset by executing the function of the radio resourcemanagement unit.

[II. Application Example Regarding Terminal Device]

FIG. 10 is a block diagram illustrating an example of a schematicconfiguration of a smartphone 900 to which the technology of the presentdisclosure may be applied. The smartphone 900 includes a processor 901,a memory 902, a storage 903, an external connection interface 904, acamera 906, a sensor 907, a microphone 908, an input device 909, adisplay device 910, a speaker 911, a radio communication interface 912,one or more antenna switches 915, one or more antennas 916, a bus 917, abattery 918, and an auxiliary controller 919.

The processor 901 may be, for example, a CPU or a system on a chip(SoC), and controls functions of an application layer and another layerof the smartphone 900. The memory 902 includes RAM and ROM, and stores aprogram that is executed by the processor 901, and data. The storage 903may include a storage medium such as a semiconductor memory and a harddisk. The external connection interface 904 is an interface forconnecting an external device such as a memory card and a universalserial bus (USB) device to the smartphone 900.

The camera 906 includes an image sensor such as a charge coupled device(CCD) and a complementary metal oxide semiconductor (CMOS), andgenerates a captured image. The sensor 907 may include a group ofsensors such as a measurement sensor, a gyro sensor, a geomagneticsensor, and an acceleration sensor. The microphone 908 converts soundsthat are input to the smartphone 900 to audio signals. The input device909 includes, for example, a touch sensor configured to detect touchonto a screen of the display device 910, a keypad, a keyboard, a button,or a switch, and receives an operation or an information input from auser. The display device 910 includes a screen such as a liquid crystaldisplay (LCD) and an organic light-emitting diode (OLED) display, anddisplays an output image of the smartphone 900. The speaker 911 convertsaudio signals that are output from the smartphone 900 to sounds.

The radio communication interface 912 supports any cellularcommunication scheme such as LET and LTE-Advanced, and performs radiocommunication. The radio communication interface 912 may typicallyinclude, for example, a BB processor 913 and an RF circuit 914. The BBprocessor 913 may perform, for example, encoding/decoding,modulating/demodulating, and multiplexing/demultiplexing, and performsvarious types of signal processing for radio communication. Meanwhile,the RF circuit 914 may include, for example, a mixer, a filter, and anamplifier, and transmits and receives radio signals via the antenna 916.The radio communication interface 912 may be a one chip module havingthe BB processor 913 and the RF circuit 914 integrated thereon. Theradio communication interface 912 may include the multiple BB processors913 and the multiple RF circuits 914, as illustrated in FIG. 10.Although FIG. 10 illustrates the example in which the radiocommunication interface 912 includes the multiple BB processors 913 andthe multiple RF circuits 914, the radio communication interface 912 mayalso include a single BB processor 913 or a single RF circuit 914.

Furthermore, in addition to a cellular communication scheme, the radiocommunication interface 912 may support another type of radiocommunication scheme such as a short-distance wireless communicationscheme, a near field communication scheme, and a radio local areanetwork (LAN) scheme. In that case, the radio communication interface912 may include the BB processor 913 and the RF circuit 914 for eachradio communication scheme.

Each of the antenna switches 915 switches connection destinations of theantennas 916 among multiple circuits (such as circuits for differentradio communication schemes) included in the radio communicationinterface 912.

Each of the antennas 916 includes a single or multiple antenna elements(such as multiple antenna elements included in an MIMO antenna), and isused for the radio communication interface 912 to transmit and receiveradio signals. The smartphone 900 may include the multiple antennas 916,as illustrated in FIG. 10. Although FIG. 10 illustrates the example inwhich the smartphone 900 includes the multiple antennas 916, thesmartphone 900 may also include a single antenna 916.

Furthermore, the smartphone 900 may include the antenna 916 for eachradio communication scheme. In that case, the antenna switches 915 maybe omitted from the configuration of the smartphone 900.

The bus 917 connects the processor 901, the memory 902, the storage 903,the external connection interface 904, the camera 906, the sensor 907,the microphone 908, the input device 909, the display device 910, thespeaker 911, the radio communication interface 912, and the auxiliarycontroller 919 to each other. The battery 918 supplies power to blocksof the smartphone 900 illustrated in FIG. 10 via feeder lines, which arepartially shown as dashed lines in the figure. The auxiliary controller919 operates a minimum necessary function of the smartphone 900, forexample, in a sleep mode.

In the smart phone 900 shown in FIG. 10, the information acquiring unitand the capability flag transmitting unit shown in FIG. 1 and FIG. 2 canbe implemented by the wireless communication interface 912. At leastpart of the functions may be realized by the processor 901 and theauxiliary controller 919. For example, the processor 901 or theauxiliary controller 919 may execute an operation to measure a referencesignal by executing a function of the measuring unit, and the processor901 or the auxiliary controller 919 may execute an operation to performcell reselection or measurement report based on the cell specificdynamic offset and the measurement result by executing the function ofthe cell reselection/measurement report unit.

To be further noted, in the apparatus, method and system according tothe invention, the respective components or steps can be decomposedand/or recombined. These decompositions and/or recombinations shall beregarded as equivalent schemes of the invention. Moreover, the aboveseries of processing steps can naturally be performed temporally in thesequence as described above but will not be limited thereto, and some ofthe steps can be performed in parallel or independently from each other.

Finally, to be further noted, the term “include”, “comprise” or anyvariant thereof is intended to encompass nonexclusive inclusion so thata process, method, article or device including a series of elementsincludes not only those elements but also other elements which have beennot listed definitely or an element(s) inherent to the process, method,article or device. Moreover, the expression “comprising a(n) . . . ” inwhich an element is defined will not preclude presence of an additionalidentical element(s) in a process, method, article or device comprisingthe defined element(s)” unless further defined.

Although the embodiments of the invention have been described above indetail in connection with the drawings, it shall be appreciated that theembodiments as described above are merely illustrative but notlimitative of the invention. Those skilled in the art can make variousmodifications and variations to the above embodiments without departingfrom the spirit and scope of the invention. Therefore, the scope of theinvention is defined merely by the appended claims and theirequivalents.

1. A device for a base station apparatus side in wirelesscommunications, comprising: circuitry configured to: generate systeminformation used by a user equipment for cell reselection, wherein acell reselection parameter related to a cell load condition of a servingcell is contained in an information element SystemInformationBlockType3,and a cell reselection parameter related to a cell load condition of aneighboring cell is contained in an information elementSystemInformationBlockType5; and provide the system information to theuser equipment.
 2. The device according to claim 1, wherein the smallerthe cell load of the neighboring cell is, the greater the opportunity ofthe neighboring cell being reselected as a target cell is.
 3. The deviceaccording to claim 1, wherein the cell reselection parameter related tothe cell load condition changes dynamically with a service state of thecorresponding cell.
 4. The device according to claim 3, wherein thedevice acquires information from an X2 communication interface, todetermine the cell reselection parameter related to the cell loadcondition of the neighboring cell.
 5. A device for a user equipment sidein wireless communications, comprising: circuitry configured to: acquiresystem information used by the user equipment for performing cellreselection, wherein a cell reselection parameter related to a cell loadcondition of a serving cell is acquired via an information elementSystemInformationBlockType3, and a cell reselection parameter related toa cell load condition of a neighboring cell is acquired via aninformation element SystemInformationBlockType5; measure the servingcell and the neighboring cell in a RRC idle state; and perform the cellreselection based on the cell reselection parameter related to the cellload condition and measurement results on the serving cell and theneighboring cell.
 6. The device according to claim 5, wherein thesmaller the cell load of the neighboring cell is, the greater theopportunity of the neighboring cell being reselected as a target cellis.